Valve mechanism for internal-combustion engines



Dec- 9, 1930. H. H. ESLINGER- 1,784,421

VALVE MECHANISM FOR INTERNALCOMBUSTION ENGINES Original Filed July 2, 1924 v annual ATTORNEY.

Patented Dec. 9, 1930 UNITED STATES PATENT oF icE HARVEY H. ESLINGER, OF HECKTOWN, PENNSYLVANIA, ASSIGNOR TO ESLINGER, MOTORS COMPANY, A CORPORATION OF DELAWARE VALVE MECHANISM FOR TNTERNAL-GOMBUSTION ENGINES Application filed July 2, 1924, Serial No. 723,630. Renewed May 14, 1930.

. The invention relates to valve mechanism for four cycle engines in which use is made of a single reciprocating piston valve.

The principal objects of the present invention are, first, to provide a simple, reliable and efficient construction; second, to provide free and easy passage for both the intake and exhaust; third, to prevent overheating of the valve and valve rod; and fourth, to provide in for sufficient lubrication of the valve.

Other objects of the invention will appear from the following description and the invention will be claimed at the end hereof after having been first described inconnection with the embodiment of it chosen for illustration in the accompanyingdrawings in which Figure 1 is a schematic and diagrammatic sectional view of mechanism embodying features of the invention, and

Fig. 2 is a sectional plan view illustrating a detail of construction. p

In the drawings 1 is a valve cylinder open or having an opening through its outer end 2 to exhaust 3, and this valve cylinder is provided at its inner end with a valve receiving chamber 4 arranged out of the path of the exhaust. Through the bottom wall 5 of this chamber 4 is arranged a valve rod opening 6.

o The cylinder 1 above the chamber 4 and at i the top of the chamber 4 is provided with an engine cylinder port 7, and between the top and bottom. of the chamber 4 there is an intake port 8. 9 is a piston valve reciprocatable in the cylinder 1 and adapted for retraction into the chamber 4eto uncover the engine cylinder port 7 and permit exhaust to pass over the top of the valve 9. In this position thevalve can be satisfactorily lubri- 4o cated because it is not unduly heated by the exhaust which passes and rises above it. Lubricant may be supplied through the feed pipe 10 and delivered to the duct 11 opening radially into the valve rod 12 and extending 1;: axially through the same and then radially as at 13 and 14 to the cylindrical surface of the valve. The piston valve is also adapted for projection out of the chamber 4 to uncover the inlet port 8 and the engine cylinder 59 port 7. 15 is a packing ring of metal an ranged in a peripheral groove in the valve piston 9 and when it exceeds in depth the distance between the top and bottom walls of the engine cylinder port 7 it spans the opening and consequently works smoothly and efficiently. Between the packing ring 15 and the wall of the groove in which it is arranged the lubricant is introduced through the duct 14. The bottom surface of the piston valve 9 is shown at 16 as upwardly beveled in proximity with the port 7 which promotes clearance and promptness in uncovering the port 7 for the introduction of charges. It will be observed that thevalve rod 12 and the hearing or opening in the wall 5 through which it works are not exposed to the direct heat of the exhaust and are therefore permitted to remain comparatively cool. The shafts 17 and 18 are driven in such relation that the shaft 17 makes two revolutions for each revolution of the shaft 18., On the shaft 18 is a cam 19, the high part 20 of which is substantially circular so that the valve 9 is held or caused to dwell. in its uppermost position to facilitate the ready intake of the charge. The valve rod 12 is caused to follow the cam by the action of the spring 21, and the valve rod is shown as provided with a forked end in which there is a cam roller 22. The fork at the end of the rod 12 is one way 0 of keeping the valve 9 from rotation which if permitted might displace not only the part 16 but also disarrange the location of the split in the metal packing ring 15. In Fig.

2 the location of the split t in the ring is clearly shown. Of course the described valve cylinder may be provided in the same piece or casting as the engine cylinder 31, or the valve cylinder, or more accurately, a series of valve cylinders may be provided in a separate casting secured to the engine casting 31,

and the latter is the construction illustrated 

